Low thrust pulsation permanent magnet linear motor

A permanent magnet linear motor, low thrust technology, applied in electrical components, electromechanical devices, propulsion systems, etc., can solve the problem of large thrust pulsation, reduce the pulse amplitude value, reduce the time spent, and improve the waveform.

Active Publication Date: 2015-08-12
SUZHOU VEGA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that the thrust pulsation is relatively large

Method used

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  • Low thrust pulsation permanent magnet linear motor
  • Low thrust pulsation permanent magnet linear motor
  • Low thrust pulsation permanent magnet linear motor

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as figure 1 The shown embodiment is a permanent magnet linear motor with low thrust pulsation, which includes a long strip-shaped secondary 1 and a primary 2 that is arranged above the secondary and can move along the length of the secondary; There is a gap between the lower surface and the secondary upper surface. The primary is composed of iron chips 3 stacked vertically in sequence. The lower part of each iron chip is provided with a straight tooth 4 in a fractional groove structure. Straight slots 5 are formed, and coils are arranged on each odd-numbered straight tooth arranged from left to right; the secondary side includes a long bar-shaped yoke 6, and bar-shaped permanent magnets 7 arranged in two rows at intervals on the upper surface of the yoke ; Adjacent permanent magnets in the permanent magnets in the same row are arra...

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Abstract

The invention discloses a low thrust pulsation permanent magnet linear motor, comprising a long-strip secondary pole and a primary pole which is on the secondary pole and can move along the length direction of the secondary pole. Gaps are arranged between the lower surface of the primary pole and the upper surface of the secondary pole on a support frame. The secondary pole is formed by arranging a plurality of iron chips in a front-rear vertical overlying manner in sequence. The lower part of each iron chip is provided with straight teeth in a fractional-slot structure. Adjacent straight teeth form a straight channel. Coils are arranged on the straight channels which are in odd number or even number and are arranged from left to right. The secondary pole comprises a long-strip magnet yoke, bar permanent magnets which are arranged in a front-rear row manner at interval on the upper surface of the magnet yoke. In the same row of permanent magnets, adjacent permanent magnets are arranged at interval. Polarity of the same direction ends of adjacent permanent magnets in the same row of permanent magnets is different, and polarity of close ends of opposite permanent magnets in the two rows of permanent magnets is the same. The low thrust pulsation permanent magnet linear motor is characterized in that linear motor thrust pulsation is effectively restrained through restraining end detent forces and cogging forces.

Description

technical field [0001] The invention relates to the technical field of permanent magnet linear motors, in particular to a permanent magnet linear motor with low thrust pulsation that can effectively suppress thrust pulsation under the premise of keeping the thrust density constant. Background technique [0002] Linear motors are a new type of direct drive technology developed recently. Because linear motors have outstanding advantages such as zero transmission chain, no contact, no backlash, high stiffness, and fast response, linear motors are gradually replacing servo motors and ball screws. And other indirect servo mechanisms have become the core functional components of high-speed, precision and high-end equipment. Due to the special structure of the linear motor, its magnetic circuit is no longer continuous and closed like the permanent magnet synchronous motor, and there is an edge effect; and because the iron core is slotted, the magnetic circuit is no longer uniform, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/03
Inventor 廖有用俞岳平韩旭奎陈俊峰
Owner SUZHOU VEGA TECH CO LTD
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